aspen模拟调试时遇到的不收敛问题

Lotus1990

Loop $OLVER01 Method: WEGSTEIN     Iteration   30
  *   WARNING
      CONVERGENCE BLOCK $OLVER01 NOT CONVERGED IN 30 ITERATIONS

   3 vars not converged, Max Err/Tol  -0.68792E+04
  **  ERROR
      Convergence block $OLVER01 did not converge
      normally in the final pass


->Generating block results ...

    Block: ABS      Model: HEATER
  **  ERROR WHILE GENERATING RESULTS FOR UNIT OPERATIONS BLOCK: "ABS" (MODEL:
      "HEATER")
      TEMPERATURE HIT THE UPPER BOUND. T-LOOP NOT CONVERGED IN  28  ITERATIONS.


    Block: COND     Model: HEATER

    Block: PUMP     Model: PUMP
      INFORMATION WHILE GENERATING RESULTS FOR UNIT OPERATIONS BLOCK: "PUMP"
      (MODEL: "PUMP")
      NET POSITIVE SUCTION HEAD IS LESS THAN ZERO

  *   WARNING WHILE GENERATING RESULTS FOR UNIT OPERATIONS BLOCK: "PUMP"
      (MODEL: "PUMP")
      VAPOR EXISTS IN THE OUTLET STREAM, AND THE VALUE (0.64075)
      IS GREATER THAN THAT IN THE INLET STREAM (0.0000).
      THE RESULTS MAY BE UNRELIABLE.


->Simulation calculations completed ...
请帮忙啊，兄弟们